[R] superpose two variables in lattice/xyplot

From: Arien Lam <A.Lam_at_geo.uu.nl>
Date: Fri 12 May 2006 - 22:48:08 EST

Dear R users,

I try to use xyplot() to display two different response variables from the same dataframe per panel, but don't succeed:

xyplot(ptot.seaslog ~ vmcwit | seas, data=reeks, as.table=TRUE,

        panel =  function(x,y){
          panel.xyplot(x, y, ylim=c(0,1))
          panel.superpose(x=reeks$vmcwit, y=reeks$ptotbin,
            panel.groups = "panel.xyplot", groups=reeks$seas,
            subscripts = TRUE, col="red" )


The second respons variable "reeks$ptotbin" is plotted, but is not subset for each of 4 panels. How can it be done?

Any suggestions warmly appreciated.

Kind regards, Arien

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